Version of wayland protocol does WebOS 7 use etc?

I’m porting a native app (C/C++) to web os and making progress with developer mode. But I could do with finding out more about the target to help me.

I am currently targeting a LG OLED65C2 that comes pre-installed with WebOS 7.2.0.

What version of wayland protocols is in use?
(wayland / wayland-protocols · GitLab)

What version of wayland is in use?
(wayland / wayland · GitLab)

What version of mesa is in use? (gitlab mesa) - libEGL, libGLES

Lastly, the kernel included is aarch64. But the OS is 32-bit. Why is there no 64-bit OS included? There is no 64-bit linker included on the target device, but it is included on lg open source website for the TV.